|
Title
|
|
|
|
Measurement of the Υ(1S), Υ(2S), and Υ(3S) polarizations in pp collisions at
| |
|
Author
|
|
|
|
| |
|
Institution/Organisation
|
|
|
|
CMS Collaboration
| |
|
Abstract
|
|
|
|
| The polarizations of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) mesons are measured in proton-proton collisions at root s = 7 TeV, using a data sample of Upsilon(nS) -> mu(+)mu(-) decays collected by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb(-1). The dimuon decay angular distributions are analyzed in three different polarization frames. The polarization parameters lambda(theta), lambda(phi), and lambda(theta phi), as well as the frame-invariant quantity (lambda) over tilde, are presented as a function of the Upsilon(nS) transverse momentum between 10 and 50 GeV, in the rapidity ranges vertical bar y vertical bar < 0: 6 and 0: 6 < vertical bar y vertical bar < 1.2. No evidence of large transverse or longitudinal polarizations is seen in the explored kinematic region. DOI: 10.1103/PhysRevLett.110.081802 |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y., 1958, currens
| |
|
Publication
|
|
|
|
New York, N.Y.
:
American Physical Society
,
2013
| |
|
ISSN
|
|
|
|
0031-9007
[print]
1079-7114
[online]
| |
|
DOI
|
|
|
|
10.1103/PHYSREVLETT.110.081802
| |
|
Volume/pages
|
|
|
|
110
:8
(2013)
, 15 p.
| |
|
Article Reference
|
|
|
|
081802
| |
|
ISI
|
|
|
|
000315141600005
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|